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This is the EK Base component of AP Products' EK Series slide-out seal system, built with a straight edge for easy alignment and an adhesive backing for installation on new builds or when replacing worn-out rubber seals. It can also be mounted with fasteners if you prefer a mechanical fix.
The matching EK D-Seal insert (sold separately) slides onto the track molded into this base, hiding the fasteners and completing a positive weather seal around the slide-out opening.
Order the matching D-Seal insert separately to complete the seal.